Grinding-wheel grader.



U. STEINER.

GRINDING WHEEL GRADER.

APPLICATION FILED JULY 26, 1912.

1 9 35, Patented Dec.19,1916.

2 SHEETSSH EET 1.

WITNESSES U. STEINER.

GRINDING WHEEL GRADER.

APPLICATION FILED JULY 26, 1912.

Patented Dec. 19, 1916.

2 SHEETS-SHEET 2.

WITNESSES I A llornej S ULBIGH STEINEB, OI WAYNESBOBO, PENNSYLV s GRINDING-WHEEL GRADEB.

Specification of Letters Patent.

Patented Dec. 19, 1916.

Application filed July 26, 1912. Serial No. 711,702.

To all whom it may concern Be it known that I, ULRICH S'rnmnn, a citizen of the United States, residing at Waynesboro, Franklin county, and State of Pennsylvania, have invented and. discovered certain new and useful Improvements in Grinding-Wheel Graders, of which the fol-.

lowing is a specification.

The object of my said invention is to provide an implement for determining the degree of hardness, or grade, of substances, the implement being especially designed for determining the grade or hardness, or solidity, of grinding wheels, or their quality of holding the abrasive particles, together, whereby grinding wheels for various classes of Work can be selected of theappropriate gradeand said grade be accurately determined, and it consists in the construction and arrangement of mechanism whereby these results are secured, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is aside elevation of an implement embodying my said invention, Fig. 2 an edge view thereof, Fig. 3 a deta1l cen-' tral section on the dotted line 3-3 in Fig. 1, Fig. 4 a detail central section on the dotted line 44 in Fig. 1, Fig. 5 a detail crosssection on the dotted line 55 in Fig. 1, F1g. 6 a detail underside lan as seen when looking in the direction in icated by the arrows from the dotted line 66 in Fig. 1, F1g. 7 a side elevation of the grading tool or point, and Fig. 8 an end face view thereof.

.In said drawings the portions marked A represent the body, B'a scale carrying segment, and C a pointer or indicator therefor.

The body A is preferably of cast metal and substantially of the form indicated in Fig. 1, or U-shaped with an opening adapted to receive the edge of the grinding wheel and having a head a and a respectively, on the opposite ends with vertical perforations to receive and support the clamping and carrying mechanism. Three cone points 10 are mounted on the inner face of the inner end of the head a, preferably arranged in the form of a triangle, to form one side of the clam for securing the implement to the grin ing wheel. A sleeve 12 is mounted in the opposite head a of said body A and adapted to slide freely therein, being held 1n Y therein,

position by a spring detent or pin 13 adapted to engage any one of a series of sockets e in the adjacent side of said sleeve. Said detent 13 is mounted in a transverse perforation in the adJacent part of body A with a sprmg 14 to normally hold it in engagement tends'out through a slot 16 in body A by which said detent 13 may be withdrawn from sockets s as desired. The inner end of said sleeve 12 is internally screw-threaded and a screw-threaded rod 17 is mounted being provided with a clamping head 18 on its inner end and a handle 19 on its outer end. It will be understood, of course, that the sleeve 12 may be dispensed with and clamping screw '17 mounted directly 1n the head a of the body A, but by the arrangement above described said sleeve may be slid back and forth until clamping head 18 1s in approximately the position des red when the screw 17 is moved to position. By this arrangement the operation of the clamp is facilitated.

A sleeve 20 extends through .a longitudinal wlth one of said sockets in said sleeve 12. A transverse pin 15 1s inserted therein and experforation in the head a and a coiled spring 1 outer end of sleeve 20 being formed with an,

annular flange f at its inner end. A hand nut 26 is mounted on the screw-threaded outer end of sleeve 20 and is adapted to 0perate against the outer end of said sleeve 25 as well as to support said sleeve 20 and parts connected therewith in said head a. The grading tool 27 is mounted in a socket in the inner end of sleeve 20 and secured from turning therein by a transverse set screw 28 which engages a flattened side of said tool but not to clamp it from longitudinal movement. A screw rod 29 with a handle 30 on its outer end is mounted in said sleeve 20 being formed screw-threaded near its inner end and engaging with screw threads in the interior of said sleeve 20, its extreme inner end being adapted to bear upon the adjacent end of grading tool 27.

The segment B is supported from the side of body A b a laterally projecting 'arm I) and has a see c on its face as indicated most clearl in Fig. 2.

In cater arm 0 is mounted on a pivot 31, which pivot is supported in the arm 6 and an appropriate bracket 32 connected therewith by a screw 33. A pinion 34 is rigidly connected with .said indicator arm to move therewith and a rack 35 carried by a sliding plunger 36 engages with said inion. Said plunger 36 is mounted in an a acent longitudinal perforation in head a and is normally held outward by. a spring 37 in the inner end of said perforation. lange f of sleeve 25, rests upon the outer end of said plunger as indicated most clearly in Fig. 3.

In Figs. 7 and 8 I have illustrated more fully the particular form of grading tool 27 which is especially ada ted for this work, the form being designed to enable the operating point of said tool to retain its original shape throughout its life. It will be noted by referring to said Figs. 7 and 8' that the outer ed es of the grading point are thicker than t e central portlon. ThlS is to provide for equal resistance to the wear during the rotary movement of the tool. Since the outer portion or the periphery of the tool travels farther each revolution than the inner, or central, portion, it follows that the wear will be greater at the periphery than at the center, and that said wear will increase as the distance from the center increases. By forming the point 'of'the tool as shown it will be seen that the tool will wear evenly across its face and maintain its original shape throughout the period of its usa e.

0 operation of my said invention is as follows The implement is placed upon the edge of the grinding wheel by inserting said grinding wheel in the central recess in the ody A with the cone points 10 resting upon one side of said Wheel. Sleeve 12 is then slid to bring the clamping head 18 as near the opposite side of'the wheel as will be permitted by the arrangement of the socket s in its side, the detent 13 engaglng the outermost socket which can be reached by the sliding movement of said sleeve, and the.

head 18 being screwed back close to the inner end of said sleeve, as shown in Fig. 4. The screw 17 is then turned by means of the handle 19 and the implement is securely clamped to the grinding wheel. Before this clamping operation screw 29 is backed in sleeve 20 and grading tool 27 slid into its socket to bring its point behind the points of the clamping cones 10 so that said grading tool will not be forced into the wheel by the clamping operation. After the imple- 'ment is clamped in position screw 29 is turned by means of handle 30 to force grading tool 27 against the side of the wheel to be tested. This movement serves to draw sleeve 20 outward, compressing spring 21, and, at the same time, carrying sleeve 25 outward, permitting plunger 36 to slide outward under the pressure of spring 37, and through the rack and-pinion connection operating the pointer C until it points to zero on the indicator dial. When this point is reached the turning'of screw 29 is sto ped and then sleeve 20 is turned by the han nut 26 .on its upper end. This will turn grading tool 27, which is held to turn with said sleeve by screw 28, and force it into the side of the grinding wheel under the tension of spring 21. As said tool bores into the grinding wheel, sleeve 20, carrying with it sleeve 25, will slide inwardly and the flange f u on said sleeve 25 bearing upon the outer end of plunger 36 will operate pointer Q from zero toward 100 on the scale segment B. As will be seen a predetermined number of turns of said rading tool will form a depression in the side of the grinding wheel of greater or less depth according to the hardness of the wheel and a consequent greater or less swing of the indicator arm will result. By this means the turnin of said grading tool a certain number 0 turns as the implement is placed upon one wheel and then nother will determine the comparative grades of hardness of said wheels and the scale being arranged to indicate certain degrees of hardness, the pointer will accurately measure and register the grade of each wheel. By reason of the particular form of point of the grading tool the accuracy of the grading instrument is maintained as said point is maintained of uniform shape and thus will have a uniform operation at each turn throughout its life.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent is:

1. A grading instrument comprising a body, means for clampin said body to the article to be graded, a sliding sleeve mounted in an adjacent part of said 30 a grading tool mounted in said sliding sleeve, means for turning said sleeve, means for forcing said grading tool into the article to be tested, an indicator dial, and an indicator arm operatively connected to the sleeve, whereby it is operated by the movement of said sleeve, substantially as set forth.

2. A grading instrument comprising a body, means for clamping said body to the article to be graded, a sliding'part in the adjacent portion of said body, a grading tool mounted in said sliding part means for operating said sliding part to orce said grading tool into the article to be tested, an indicator scale, a coeperating indicator arm, an operative connection between said indicator arm and the movable part whereby said indicator arm is operated by said movable part, substantially as set forth.

3. A grading instrument comprising a body, means for clamping said body to the article to be graded, a sliding sleeve mounted to turn in said body, a grading tool carried by said sliding sleeve, means for exerting pressure against said sliding sleeve as it is turned, and an indicator operated by the movement of said sleeve, substantially as set forth.

4. A grading instrument comprising a body, means for clamping said body to the article to be graded, a sleeve mounted in said body, a spring for normally holding said sleeve toward the article to be tested, a grading tool mounted in said sleeve, means for supporting said sleeve and drawing it outward, a spring operatively interposed between said sleeve and the body, means for operating said sleeve, and an indicator connected to be operated thereby, substantially as set forth.

5. A grading instrument comprising a body, means for holding said body to the article to be tested, a grading tool mounted under pressure to bear against said article, means for exerting pressure against said grading tool, means for operating said grading tool to bore into said article, and an indicator mechanism connected to be operated by the inward movement of said tool to measure the same, substantially as set forth.

6. A grading instrument comprising a body, means for holding said body to the article to be graded, a sliding sleeve in said body, a grading tool carried by said sliding sleeve, means for normally forcing said sleeve to carry said tool toward the work, means for drawing said sleeve outwardly by pressing said tool against the work, means for turning said sleeve to force said tool into the work, and an indicator operatively connected to said operating means for measuring the depression made by said tool, substantially as set forth.

7. A grading instrument comprising a body, means for securing the body to the article to be tested, a sliding part, means for forcing said sliding part toward the work, an indicator connected to be operated by the longitudinal movement of said sliding part, and a rotary grading tool carried by said sliding part formed with its point of increasing thickness from its axial center toward each edge, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Washi on, District of Columbia, this 23rd day 0 July, A. D. nineteen hundred and twelve.

ULRICH STEINER. [L.s.]

Witnesses:

E. W. BRADFORD, E. G. GLEMENTS. 

